Microsoft Pulls Copilot Domain Exclusion After Launch

Microsoft has withdrawn Domain Exclusion, a recently launched Microsoft 365 Copilot feature that gave IT administrators greater control over web grounding sources.

The company began releasing the capability last week, but has now stopped the rollout and removed access from organizations that had already received it.

Domain Exclusion blocked unwanted Copilot sources

Domain Exclusion allowed administrators to prevent Microsoft 365 Copilot from referencing selected external websites when generating grounded responses.

Administrators could block up to 1,000 domains, although they had to configure the list through a PowerShell script. Microsoft positioned the feature as a way to reduce the risk of Copilot using information from unwanted or untrusted websites.

The tool could have helped organizations restrict questionable sources and enforce stricter information policies across Microsoft 365 Copilot.

Microsoft reverses the rollout

Microsoft has now rolled back Domain Exclusion shortly after starting its release.

The reversal prevents the feature from reaching additional customers. Organizations that had already gained access will also lose the capability.

Microsoft has not explained why it withdrew the feature. The company said it is reviewing its next steps and will share more information later.

Removing the feature after deployment had already started suggests Microsoft may have encountered a problem that required more than a minor update.

Administrators questioned the exclusion model

Some IT administrators had already criticized Microsoft’s approach. An allowlist could offer a more practical option by letting organizations approve trusted sources instead of identifying every domain they want Copilot to avoid.

Maintaining a blocklist could create considerable work for administrators. The 1,000-domain limit may also prove restrictive given the number of unreliable, unwanted, or irrelevant websites available online.

The rollback follows other complaints about Microsoft’s handling of enterprise software changes. Administrators recently criticized the company for pushing OneDrive Photos to Enterprise PCs without prior notice, even though the app supports personal Microsoft accounts rather than Entra work accounts.

Domain Exclusion may return in a different form

Microsoft has not confirmed whether Domain Exclusion will return to Microsoft 365 Copilot.

Customer feedback suggests the company may need to redesign the feature, reconsider the 1,000-domain limit, or provide an allowlist option before restarting the rollout.

The decision comes as Microsoft continues expanding Copilot across its products. The company recently confirmed plans to turn Copilot into a super app and is also bringing Copilot to classic Outlook.